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Inverse Design of Metallic and Magnetic Nanostructures via Multiscale Modeling

Speaker: Zhenyu Zhang, Oak Ridge National Lab & Univ. of Tennessee
Date & Time: April 20, 2006 - 12:00pm
Location: Room 260, Wright-Rieman Chemistry Laboratory


Inverse Design of Metallic and Magnetic Nanostructures via Multiscale Modeling
Laboratory for Surface Modification


Zhenyu Zhang, Oak Ridge National Lab & Univ. of Tennessee,
12:00noon, Room 260, Wright-Rieman Chemistry Laboratory

Multiscale modeling is gaining an increasingly important role in guiding the fabrication of artificially structured nanomaterials with atomic-scale precision and desirable physical properties. In this talk, a few recent examples will be presented to illustrate its predictive power in modern materials research. The modeling approaches range from electronic-scale calculations based on first principles to mesoscopic-scale continuum elasticity theory. Specific physical systems considered include: (a) fabrication of ordered magnetic atom wires on non-magnetic metal substrates; (b) quantum growth of atomically flat superconducting metal overlayers on semiconductor substrates; and (c) optimal dopant control in dilute magnetic semiconductors via "Subsurfactant Epitaxy". Emphasis will be made on the substantially improved structure-property relationships achieved through such synergetic efforts between theory and experiment, including in the last example the striking observation of magnetic ordering temperatures well above 300 K.

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Rutgers new scanning transmission electron microscope and new helium ion microscope help researchers develop nanotechnology used to fight cancer, generate power, and create more powerful electronics. Watch the video to learn more.

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